Catalyst Tattoo is a tattoo studio at 14 Taman Ho Swee, #03-51, in Singapore's Tiong Bahru neighbourhood, holding a 5.0 Google rating, with its Facebook page as its main home online. A tattoo is permanent, so placement and line weight matter more than whatever is fashionable this year — fine work on fingers and wrists fades sooner than bolder pieces on fleshier ground. Most studios begin with a consultation: bring references, and a good artist will adapt them to how the design will sit and age on your body. When choosing an artist, look at healed work rather than fresh photos, and plan for aftercare — a few weeks of keeping the piece clean and out of the sun decides how well it settles. Tucked three floors up in a Taman Ho Swee block, Catalyst Tattoo is the kind of low-key studio Tiong Bahru does well.